Infiniti FX35, FX50 (S51). Manual - part 1012

 

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Infiniti FX35, FX50 (S51). Manual - part 1012

 

 

EXL-44

< DTC/CIRCUIT DIAGNOSIS >

[XENON TYPE]

B2503, B2504 SWIVEL ACTUATOR

DTC/CIRCUIT DIAGNOSIS

B2503, B2504 SWIVEL ACTUATOR

Description

INFOID:0000000005244694

SWIVEL ACTUATOR

The swivel actuator is installed in the headlamp unit. The swivel actuator consists of the swivel motor and the
swivel position sensor.

SWIVEL MOTOR

• The swivel motor is the two-phase step motor.
• The swivel motor drives headlamp by exciting the two drive coils according to the drive signal from AFS con-

trol unit. 

• The rotation direction of the swivel motor is changeable by changing the exciting pattern. 

SWIVEL POSITION SENSOR

The swivel position sensor detects the headlamp swivel angle to transmit the swivel position sensor signal to
AFS control unit.

DTC Logic

INFOID:0000000005244695

DTC DETECTION LOGIC

• [B2503] Swivel actuator [RH]
• [B2504] Swivel actuator [LH]

*: initialization is not included.

DTC CONFIRMATION PROCEDURE

1.

DTC ERASE

Erase the DTC memory of AFS with CONSULT-III.

>> GO TO 2.

2.

CONFIRMATION DTC SELECTION

Select "B2503" or "B2504" for confirmation.

Which DTC is confirmation?

B2503 >> GO TO 3.
B2504 >> GO TO 4.

3.

DTC CONFIRMATION (B2503)

1.

Steer to the straight-forward position.

2.

Start the engine.

3.

Turn the headlamp ON.

4.

Shift the selector lever to "N".

5.

Steer to the right. (Rotate it once or more.)

6.

Perform the self-diagnosis with CONSULT-III.

DTC detection condition

DTC erase

condition

Possible cause

AFS control unit indicates an applicable DTC when detecting any of the follow-
ing conditions continuously for 2 seconds or more. 
• AFS control unit-recognized swivel position differs extremely from the swivel 

position sensor-input value while the swivel operating.

*

• The swivel position sensor signal does not change even though AFS control 

unit transmits the swivel motor driving signal while the swivel operating

*

.

• The swivel motor short and open is detected while the swivel operating

*

.

• The swivel position sensor power supply is 6 V or more, or 4 V or less.
• The swivel position sensor signal is 0.25 V or less, or 4.75 V or more.

Ignition switch 
OFF

Swivel position sensor
• Swivel position sensor
• Harness and connector
• AFS control unit
Swivel motor
• Swivel  motor
• Harness and connector
• AFS control unit

B2503, B2504 SWIVEL ACTUATOR

EXL-45

< DTC/CIRCUIT DIAGNOSIS >

[XENON TYPE]

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

Is "B2503" detected?

YES

>> Refer to 

EXL-45, "Diagnosis Procedure"

NO

>> Refer to 

GI-36, "Intermittent Incident"

.

4.

DTC CONFIRMATION (B2504)

1.

Steer to the straight-forward position.

2.

Start the engine.

3.

Turn the headlamp ON.

4.

Drive at 25 km/h (15.5 MPH) or more.

5.

Steer to the left. (Rotate it once or more.)

6.

Stop the vehicle.

7.

Perform the self-diagnosis with CONSULT-III.

Is "B2504" detected?

YES

>> Refer to 

EXL-45, "Diagnosis Procedure"

NO

>> Refer to 

GI-36, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000005244696

1.

CHECK SWIVEL POSITION SENSOR SIGNAL INPUT

1.

Turn the ignition switch ON.

2.

Check the voltage between the AFS control unit harness connector and the ground.

Is the measurement value within the standard value?

YES

>> GO TO 2.

Less than the standard value >>GO TO 6.
Higher than the standard value>>GO TO 9.

2.

CHECK SWIVEL MOTOR

Check the swivel motor.

EXL-48, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace the front combination lamp.

3.

CHECK SWIVEL MOTOR OPEN CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect AFS control unit connector and the headlamp swivel actuator connector.

3.

Check continuity between the AFS control unit harness connector and the headlamp swivel actuator har-
ness connector.

Terminals

Voltage

(Approx.)

(+)

(

)

AFS control unit

Ground

Connector

Terminal

RH

M16

9

0.25 - 4.75 V

LH

29

EXL-46

< DTC/CIRCUIT DIAGNOSIS >

[XENON TYPE]

B2503, B2504 SWIVEL ACTUATOR

Does continuity exist?

YES

>> GO TO 4.

NO

>> Repair the harnesses or connectors.

4.

CHECK SWIVEL MOTOR SHORT CIRCUIT

Check continuity between the AFS control unit harness connector and the ground.

Does continuity exist?

YES

>> Repair the harnesses or connectors.

NO

>> GO TO 5.

5.

CHECK SWIVEL MOTOR CIRCUIT VOLTAGE OUTPUT

1.

Connect AFS control unit connector. 

2.

Turn the ignition switch ON.

3.

Turn the headlamp ON.

4.

Select “LOW BEAM TEST RIGHT” or LOW BEAM TEST LEFT“” of ADAPTIVE LIGHT active test item.

5.

With operating the test item, check the voltage between the AFS control unit harness connector and the
ground.

AFS control unit

Headlamp swivel

actuator

Continuity

Connector

Terminal

Connector

Terminal

RH

M16

11

E29

8

Existed

13

7

32

3

34

4

LH

15

E59

3

17

4

36

8

38

7

AFS control unit

Ground

Continuity

Connector

Terminal

RH

M16

11

Not existed

13

32

34

LH

15

17

36

38

B2503, B2504 SWIVEL ACTUATOR

EXL-47

< DTC/CIRCUIT DIAGNOSIS >

[XENON TYPE]

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

Is the measurement value within the standard value?

YES

>> Replace the front combination lamp.

NO

>> Replace AFS control unit.

6.

CHECK SWIVEL POSITION SENSOR SIGNAL OUTPUT

Check the voltage between the AFS control unit harness connector and the ground.

Is the measurement value normal?

YES

>> GO TO 7.

NO

>> GO TO 9.

7.

CHECK SWIVEL POSITION SENSOR POWER SUPPLY CIRCUIT INPUT VOLTAGE

1.

Turn the ignition switch OFF.

2.

Disconnect the headlamp swivel actuator connector.

3.

Turn the ignition switch ON.

4.

Check the voltage between the headlamp swivel actuator harness connector and the ground.

Is the measurement value normal?

YES

>> GO TO 8.

NO

>> Repair the harnesses or connectors.

8.

CHECK SWIVEL POSITION SENSOR SIGNAL SHORT CIRCUIT

Terminals

Condition

Voltage

(Approx.)

(+)

(

)

AFS control unit

Ground

Swivel motor

Connector

Terminal

RH

M16

11

Active

8 - 12 V

32

LH

15

36

RH

13

Stop

9.5 - 11.5 V

34

LH

17

38

SKIB2408J

Terminals

Voltage

(Approx.)

(+)

(

)

AFS control unit

Ground

Connector

Terminal

RH

M16

4

5 V

LH

24

Terminals

Voltage

(Approx.)

(+)

(

)

Headlamp swivel actuator

Ground

Connector

Terminal

RH

E29

2

5 V

LH

E59

2

 

 

 

 

 

 

 

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